SHIPBORNE GPS AND GNSS SYSTEM CALIBRATION AND REPAIR refers to the calibration and repair of the Global Positioning System (GPS) and Global Navigation Satellite System (GNSS) onboard ships. These systems are essential for accurate navigation, providing real-time positioning data. Calibration ensures the system provides reliable, precise information, while repairs address issues like signal loss, hardware malfunctions, or software glitches. Regular calibration and repair are necessary to prevent navigation errors, improving safety and efficiency in maritime operations.